High Pressure High Temperature V Sealing Stacks
V-Packing
High Pressure High Temperature V Sealing Stacks
V-Packing is an assembly made up of a nest of Chevron rings comprising a top adapter or anti-extrusion ring, Inner V-Rings and a bottom adapter. In the assembly, the energizing axial force is transferred between the individual packing rings so that each ring is pressed into positive contact with the mating hardware surface. Special material grades are available for a large variety of working conditions.
The top adapter or anti-extrusion ring is manufactured from a high modulus plastic, typically PEEK™, to resist extrusion. This component supports the Vee Rings, providing stability and extrusion resistance.
Inner V-Rings are typically made from filled PTFE materials; although, depending on the application, elastomers can be used as well to offer better sealing efficiency.
The bottom adapter ring is manufactured from PEEK™ or glass-filled PTFE. The function of this component is to ensure a uniform pressure distribution.
Operating Pressure | Up to 20,000 psi |
Speed | Up to 3.3 ft/s depending on the material |
Temperature Range | -45 °C to +260 °C / |
| VEE-RING STACK HEIGHTS WITH MIDDLE, TOP, AND BOTTOM ADAPTERS | ||||||
|---|---|---|---|---|---|---|
| Mid Piece Number | Packing Cross Section | |||||
| 3/16 | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 | |
| 3 | 0.630 | 0.750 | 0.875 | 1.000 | 1.081 | 1.250 |
| 4 | 0.740 | 0.875 | 1.031 | 1.188 | 1.300 | 1.500 |
| 5 | 0.850 | 1.000 | 1.187 | 1.375 | 1.517 | 1.750 |
| 6 | 0.960 | 1.125 | 1.344 | 1.562 | 1.735 | 2.000 |
| Rubber Application Pressure(PSI) | Fabric Reinforced Application Pressure(PSI) | Number Required |
|---|---|---|
| 500 to 1,000 | 500 to 1500 | 3 |
| 1000 to 1200 | 1,500 to 3,000 | 4 |
| 2000 to 3000 | 3,000 to 5,000 | 5 |
| 3000 to 5000 | 5,000 to 10,000 | 6 |
| 5000 over | 10,000 and over | 7 |
All parts are measured on our Zeiss O-Machine and or Keyence CMM, which utilize optical and contact measurement technology in a comprehensive analysis. The O-Machine includes multi-sensor coordinate measuring, white light sensors for non-contact assessments and extremely accurate 3D scanners.
We follow AQL 2.5 levels 1 and 2 sample size quantities, and all molded parts are manufactured to RMA A2 tolerances.
Our rubber and plastic materials supply is diversified amongst the top compounders in North America. Each polymer has been qualified to meet typical exploration and production well conditions, including mechanical, tribological, thermal, and specific immersive properties.
| Material Code | Description | Heat Deflection | Tensile Strength | Tensile Elongation | Compressive Strength | Data Sheet |
| CFP | Carbon Fiber Filled PTFE– (polytetrafluorethylene) material. It exhibits improved creep and wear resistance. Increased thermal conductivity and low coefficient of friction ensure low wear rate even under dry running conditions. It is suitable for gaskets, valve seals, packings, bearings, and piston rings. | 150°F | 1600 psi | 50.0 % | 1300 psi |  |
| GFP | Glass-fibre Filled PTFE. Glass-fibre improves the wear properties of PTFE, lowers the deformation under load at both high and low temperatures, and increases the impact resistance while leaving the electrical and chemical characteristics of PTFE essentially unchanged. It is suitable for piston rings, valve seats, shaft seals, electrical insulators, bearing pads and gaskets. This material should not be used in contact with strong alkalis and hydrofluoric acid. | 150 °F | 1750 psi | 175.0 % | 2600 psi | |
| MGFP | MolyGlass PTFE– a glass fiber and molybdenum disulfide filled polytetrafluorethylene (PTFE). It is used for bushings, bearings, and sealing elements where low creep properties with good sealability and low wear rates are desirable. | 150 °F | 3600 psi | 200.0% | 1800 psi | |
| CGTP | Carbon-graphite Filled PTFE (polytetrafluorethylene) material. Its ability to run under dry or wet conditions along with its low wear rate makes it an ideal high-temperature bearing material. It also offers high load-bearing capability, relative to other fluoropolymers, for many general-purpose industrial applications. | 150 °F | 2300 psi | 105.0 % | 2500 psi | |
| BFP | Bronze-filled PTFE (polytetrafluoroethylene). It provides better creep resistance than most of the PTFE alloys. It possesses high compressive strength and good wear and sliding properties. Most common applications include piston rings (compressors), bushes, bearings, and wear pads for high compression sliding applications. Certain chemicals may easily attack bronze. | 175 °F | 2000 psi | 100.0 % | 1700 psi | |
| Material Code | Description | Tensile Strength | Elongation | Compression Set | 100% Modulus | Data Sheet |
| H#DS | General-purpose Hydrogenated Nitrile (HNBR) compound with improved methanol and sour gas resistance over Nitrile. | See Data Sheet | See Data Sheet | See Data Sheet | See Data Sheet | |
| F#DS | General-purpose FKM (Viton®) compound. Suitable for higher temp applications and offers excellent chemical resistance. | See Data Sheet | See Data Sheet | See Data Sheet | See Data Sheet | |
| N#DS | General-purpose Nitrile compound. Offers excellent performance in petroleum lubricants, seawater, diesel fuel, valves, and actuators. | See Data Sheet | See Data Sheet | See Data Sheet | See Data Sheet | |
| MCM80 | Improved extrusion and wear resistance over standard HNBR. | 3900 psi | 210% | 15% | 1270 psi | |
| MCM90 | Improved extrusion and wear resistance over standard HNBR. | 4100 psi | 180% | < 15% | 1425 psi | |
| Material Code | Description | Heat Deflection | Tensile Strength | Tensile Elongation | Compressive Strength | Data Sheet |
| PEEK | Victrex 450G PEEK. Good toughness and impact performance, with high elongation properties. Certified to ISO 23936/NORSOK M-710 for high sour fluid ageing. | 305F | 14300 psi | 45.0% | 18100 psi | |
| GPEEK | Victrex 450GL30 PEEK. Same features as virgin PEEK, but with higher tensile strength, as well as increased shear strength. Certified to ISO 23936/NORSOK M-710 for high sour fluid ageing. | 620F | 26000 psi | 2.7% | 37000 psi | |
| MGFP | MolyGlass PTFE– a glass fiber and molybdenum disulfide filled polytetrafluorethylene (PTFE). It is used for bushings, bearings, and sealing elements where low creep properties with good sealability and low wear rates are desirable. | 150 °F | 3600 psi | 200.0% | 1800 psi |
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